Recently I had a good cheat database for my Acekard 2.1 - URSCHEAT.dat (or it was USRCHEAT.dat). I had a good amount of cheats on Pokemon Platinum like exp multipliers, and the ability to clone. I then swtiched from the OFW of Acekard to AKAIO, but I did copy the cheat database file and put it in the 'cheat' folder in AKAIO. Then when I looked at the cheats for Platinum, it showed that no cheats were available. I rebuilt the DB several times, but nothing showed up. So I then decided to download it again. I got URSCHEAT.dat (or USRCHEAT.dat) again and then the database showed up. But the cheats were so different!!!

Does anyone know if it is the cheat file that changed the cheats? Or AKAIO? And how can I put it back to what it was?

I dont know tbh. You can download a cheat file from here . That has loads of cheats and might even be the one you're talking about. It has cheats for almost every game!
Oh, and by the way, its USRCHEAT.DAT